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  <p>Please use the following URLs to access PETSc documentation:
    <ul>
      <li><a href="https://petsc.org/release">https://petsc.org/release</a> for primary PETSc documentation.</li>
      <li><a href="https://petsc.org/main">https://petsc.org/main</a> for documentation corresponding to changes in the development version of PETSc.</li>
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